Quote Originally Posted by Duramax 6.6L View Post
To update the firmware the unit must be in dead poll

For a step by step read this:

http://www.ls2.com/boggs/efilive_fir...structions.htm

Hope it helps.
Well, as is usually the case for me with these upgrades, I get screwed up.

I don't know exactly how, but I guess it is done. Thanks.